The "Rotate Side Two" feature only works when using the Automatic Document Feeder, not when scanning from the glass. We've pushed every possible combination of buttons and can't get the machine to rotate an image when scanning from the glass.
This is very important to us as we frequently scan hard-bound, large size music scores (landscape); it's physically impossible to always have the top of the page facing left. Our scans now come out with every other page upside down and this takes a long time to manually correct in the software.